I have a 26 series on a 2014 F150. Last year, the plow stopped raising fully. A couple inches shy of full height. I changed the oil and no change. Everything looks ok and the plow operates properly. I can’t get the emergency collar on the shaft because it won’t raise quite high enough. I used a floor jack and a piece of 4x4 and jacked it up as high as it would go. I still couldn’t get the collar on the shaft. So, I’m thinking it’s not a hydraulic issue. Something mechanical maybe? Anything I can check before bringing it to the shop? Thanks!